BASF/Clearfield Rice

William Baumgartner  |  12/8/2009 4:55:26 AM

BASF is the current licensee of novel herbicide-resistant rice varieties developed by the LSU AgCenter to help control yield and quality reducing red rice as well as other important rice weeds. These varieties are commercially known as Clearfield Rice and were initially licensed to American Cyanamid Corporation before the company was acquired by BASF in 2000. The genetic technology that creates the resistance was developed by Timothy Croughan at the Rice Research Station. Steve Linscombe, and others at the Station, helped breed the actual rice varieties containing the gene. The varieties were designed to be resistant to imidazolinone herbicides, two of which are imazethapyr and imazamox. These two BASF herbicides can eliminate both red rice and conventional rice and are used commercially with the technology in the U.S. The AgCenter rice varieties can survive imidazolinone treatments while red rice will be eliminated. Horizon Ag, a major seed marketing group, has assisted BASF in the further development and marketing of Clearfield varieties, while others groups, such as RiceTec, have developed hybrids that also return royalties to the LSU AgCenter. These varieties to date have had tremendous success. In 2012, Clearfield rice was grown on over 60 percent of the rice acreage in the southern United States, and it has generated over $20 million for the university since 2003.

September 1, 2000
Delta King shows new Clearfield rice

November 30, 2001
Clearfield rice varieties headed for Mid-South fields

February 15, 2002
Canada clears herbicide-resistant rice for distribution

Fall 2003
Clearfield Rice: It's Not a GMO

April 2004
Clearfield Variety Helps Farmers Intensify Battle With Red Rice

October 10, 2004
To Control Red Rice, the Choice is Clearfield

August 11, 2006
At Crowley research station Rice varieties, crosses advancing

February 22, 2008
Full roster of Clearfield rice expected for 2009 season

Septmber 18, 2009
Horizon's Clearfield rice delivers yields for farmers

Fall 2012
Clearfield technology changes the rice industry

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